Jean Veronis at Technologies du Langage has done some additional measurement and modeling of Google count oddities. I haven't had a chance to work through his latest stuff in detail, but it looks like he has hold of something. Jean's bottom line recommendation: "if you want to know the real index count for any word, simply type it twice:"
| Word | Count |
|---|---|
| stuttering | 749,000 |
| stuttering stuttering | 452,000 |